Are all the interior speakers in the teg 6.5? I was thinking of putting in a 6.5 subwoofer in the rear and 6.5 components in the front. I'm getting type-r door panels with the tweeter holes and was going to throw the tweeters from the components in the empty spots. Wondering if anyone has put 6.5 subs in the rear stock spots, or if there is even enought mounting depth to do so. Anyone know the rear speaker mounting depth?

 

First, I don't think a 6.5 inch sub exsist's. Either 6" or 8". Second, I suggest not wasting you time putting subs in the factory rear speaker locations. You would need a "free air" subwoofer, and they sound like ***. Plus there would be alot of rattling, and I think the grill sits pretty close to the speaker so I don't think there would even be enough room for the cone to move. Just put a small sub in your trunk it will sound alot better.
To answer your question, yes all speakers in an INTEGRA(97+, IM NOT SO SURE ABOUT OLDER INTEGRAS) are "said" to be 6.5. I really don't know why they say they are 6.5 because you can't fit a 6.5 w/o modification. A 6" would fit fine.

 

the stock mounting locations are made for 6.5 inch speakers the only thing is most aftermarket speakers have a larger magnet meaning you have to trim the "basket" the speaker fits into in the doors, or just throw it out